http;//lingix.gro.clinux.org/personal/sunwen/ekook/1.pdf
http;//lingix.gro.clinux.org/personal/sunwen/ekook/2.pdf
http;//lingix.gro.clinux.org/personal/sunwen/ekook/3.pdf
http;//lingix.gro.clinux.org/personal/sunwen/ekook/4.pdf
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